The pot is plenty big. But: will both it and the plant overwinter outdoors there, out in the air with no added protection?

Thanks bboy for answering. The pot should be fine since it is some sort of light weight plastic type thing. Not clay. I could overwinter it in my garage if that is a better idea.
Ally

Ally,
What a great idea!
I never thought of a blueberry plant in a pot.
SOunds like a great plant! I researched it online.
I live in Bucks also and am thinking of getting one next spring for my house now.
Oh, by the way, the pot looks fine for your plant.
Sit the plant up close to your house when we get the real cold weather in Jan and Feb.
The heat from the building will keep it alive and well in the winter.
Good Luck with it.

any dark pot in winter sun.. can be problematic.. capturing heat .. leading to loss of dormancy at the wrong time of year/winter ....

i would make absolutely sure .. that the plant is in shade all winter long .. at least the pot part ....

ken